(OBQ06.141)
The preoperative pelvic radiograph of a 63-year-old female with osteoarthritis is shown in Figure A. She undergoes an uncomplicated total hip replacement. Six weeks post-operatively she complains that her right leg is longer than her left, and an AP pelvic radiograph is obtained which is shown in Figure B. Physical exam shows normal post-operative range of motion and strength in both hips. What is the most likely etiology for this patients gait impairment?
Review Topic

(OBQ08.189)
A 65-year-old female scheduled to undergo a total hip replacement is concerned about the need of a blood transfusion. The surgeon should explain that which factor is the best predictor of the need for a blood transfusion?
Review Topic

(OBQ12.234)
A 67-year-old female complains of anterior groin pain one year following a primary, uncemented total hip arthroplasty. The pain is exacerbated when she tries to climb stairs or get up from a seated position. She denies any recent fevers or chills. On physical exam, the pain is reproduced with resisted seated hip flexion. Laboratory analysis, including WBC, ESR, and CRP are within normal limits. Radiographs reveal that the components are appropriately positioned without evidence of loosening or fracture. Which of the following is the most appropriate at this time?
Review Topic

QID:
4594

1

Revision of the acetabular component

1%

(24/3180)

2

Image-guided diagnostic injection of lidocaine into the iliopsoas tendon sheath

(OBQ12.164)
A 45-year-old man has had the gait disturbance shown in Video A ever since a total hip replacement two years ago. Since then he has undergone physical therapy and nerve exploration without any clinical improvement. Extensive AFO bracing was attempted but was not tolerated by the patient. A recent ankle radiograph is shown in Figure A. The Silfverskiold test reveals dorsiflexion of 20 degrees with knee flexion, and 10 degrees with full knee extension. The results of muscle testing using a Cybex dynamometer are shown in Figure B. What is the most appropriate next step in in treatment.
Review Topic

QID:
4524

FIGURES:

V

A

B

1

Ankle arthrodesis in 30 degrees of dorsiflexion

1%

(27/3127)

2

Posterior tibial tendon transfer to the lateral cuneiform through the interosseous membrane